Name:

i$.$ Actual formula of magnesium oxide $($based on charge of $Mg$ and $O)$:

j$.$ Theoretical mass $\%$ of $Mg$ based on the actual formula of magnesium oxide. $($Hint: you will

need the molar mass of magnesium and magnesium oxide$).$

k$.$ Percent error in $\%Mg$ :

$\%$ error $=\frac{\text{e}\text{x}\text{p}\text{e}\text{r}\text{i}\text{m}\text{e}\text{n}\text{t}\text{a}\text{l}\text{v}\text{a}\text{l}\text{u}\text{e}-\text{t}\text{h}\text{e}\text{o}\text{r}\text{e}\text{t}\text{i}\text{c}\text{a}\text{l}\text{v}\text{a}\text{l}\text{u}\text{e}}{\text{t}\text{h}\text{e}\text{o}\text{r}\text{e}\text{t}\text{i}\text{c}\text{a}\text{l}\text{v}\text{a}\text{l}\text{u}\text{e}}100\%$

Discussion questions

Write the balanced chemical equation for the formation of magnesium oxide.

Magnesium nitride is an impurity formed by the reaction of magnesium with nitrogen. Write

down the balanced chemical equation for the formation of magnesium nitride.

What happens when we add water to magnesium nitride? Write down the balanced chemical

equation. Hint: one of the product is ammonia: $(N{H}_3).$

Discuss two sources of error in this experiment that might account for a high percentage error

in $\%Mg.$